Amino acid
Building blocks of peptides and proteins—examples include glycine, lysine, and arginine.
What is Amino acid?
Building blocks of peptides and proteins—examples include glycine, lysine, and arginine. Cosmetic peptides are defined sequences of specific amino acids. The order matters: Gly-His-Lys (GHK) is not the same as His-Gly-Lys.
Where you will see Amino acid
On product labels, look for the INCI name in the full ingredient list—not just front-of-pack nicknames. Concentration, formula pH, and what else is in the bottle all change how a peptide behaves on skin or hair.
Common questions
What does Amino acid mean?
Building blocks of peptides and proteins—examples include glycine, lysine, and arginine. Cosmetic peptides are defined sequences of specific amino acids. The order matters: Gly-His-Lys (GHK) is not the same as His-Gly-Lys.
Is Amino acid an INCI ingredient name?
Sometimes. Brands use nicknames on the front label and INCI names on the back. Search our directory with either form to find the matching peptide page.